HOMEVULNERABILITIESCVE-2018-18913
HIGH

CVE-2018-18913

CWE-426Published: March 21, 2019· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

Opera before 57.0.3098.106 is vulnerable to a DLL Search Order hijacking attack where an attacker can send a ZIP archive composed of an HTML page along with a malicious DLL to the target. Once the document is opened, it may allow the attacker to take full control of the system from any location within the system. The issue lies in the loading of the shcore.dll and dcomp.dll files: these files are being searched for by the program in the same system-wide directory where the HTML file is executed.

NVD Source

Technical Analysis

CVE-2018-18913 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Microsoft1 product(s)
windows 7
opera1 product(s)
opera browser
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://blogs.opera.com/desktop/changelog-for-57/
ADVISORYhttps://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.html
ADVISORYhttps://blogs.opera.com/desktop/changelog-for-57/
ADVISORYhttps://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.html

All References (4)

→
https://blogs.opera.com/desktop/changelog-for-57/Vendor Advisory
→
https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.htmlThird Party Advisory
→
https://blogs.opera.com/desktop/changelog-for-57/Vendor Advisory
→
https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.htmlThird Party Advisory

Quick Facts

CVE IDCVE-2018-18913
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-426
CISA KEVNo
Affected2 vendor(s)
PublishedMar 21, 2019

Related CVEs (CWE-426)

CVE-2018-19486
9.8
CVE-2022-3734
9.8
CVE-2024-53866
9.8
CVE-2022-26184
9.8
CVE-2026-45772
9.8
CVE-2017-2225
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-18913 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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